forked from lijiext/lammps
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
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#ifndef ELECTRON_DRAG_POWER_H
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#define ELECTRON_DRAG_POWER_H
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#include <map>
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#include <string>
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using std::map;
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using std::string;
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#include "Material.h"
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#include "ATC_TypeDefs.h"
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namespace ATC {
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/**
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* @class ElectronDragPower
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* @brief Base class for defining the lattice drag power from electrons
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*/
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class ElectronDragPower
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{
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public:
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ElectronDragPower() {};
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virtual ~ElectronDragPower() {};
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/** computes drag power */
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virtual bool electron_drag_power(const FIELD_MATS &fields,
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const GRAD_FIELD_MATS &gradFields,
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DENS_MAT & flux)
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{
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return false;
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};
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virtual void electron_drag_velocity_coefficient(const FIELD_MATS &fields,
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DENS_MAT & dragCoef)
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{
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FIELD_MATS::const_iterator t_field = fields.find(TEMPERATURE);
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dragCoef.reset((t_field->second).nRows(),1); // zero out matrix, resize if necessary
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};
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};
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//-------------------------------------------------------------------
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/**
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* @class ElectronDragPowerLinear
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* @brief Class for electron drag that linearly depends on the difference between the electron and lattice velocities
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*/
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class ElectronDragPowerLinear : public ElectronDragPower
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{
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public:
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ElectronDragPowerLinear(fstream &matfile,
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map<string,double> & parameters,
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Material * material_);
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virtual ~ElectronDragPowerLinear() {};
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virtual bool electron_drag_power(const FIELD_MATS &fields,
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const GRAD_FIELD_MATS &gradFields,
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DENS_MAT & flux);
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virtual void electron_drag_velocity_coefficient(const FIELD_MATS &fields,
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DENS_MAT & dragCoef);
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protected:
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double electronDragInvTau_;
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Material * material_;
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// used to avoid unnecessary resizing
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DENS_MAT dragCoefWorkspace_;
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DENS_MAT invEffMassWorkspace_;
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};
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}
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#endif
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